Attachment for lathes.



A. M. ROBERTS.

ATTACHMENT FOR LATHES.

APPLICATION FILED MAY 18,1911.

1,012,445. Patented Dec. 19, 1911.

WITNESSES INVENTOR M0 JZYHQMIZV ATTORNEYS COLUMBIA PLANOGRAPIICILIWASHINUTQN. .0

ADDO M. ROBERTS, 0F GBEENVILLE, PENNSYLVANIA.

ATTACHMENT FOR LATHES.

Specification of Letters Patent.

Patented Dec. 19, 1911.

Application filed May 18, 1911. Serial No. 628,017.

To all whom 'it may concern:

Be it known that I, Aono M. ROBERTS, a citizen of the United States, anda resident of Greenville, in the county of Mercer and State ofPennsylvania, have invented a new and Improved Attachment for Lathes, ofwhich the following is a full, clear, and exact description.

My invention relates to attachments for lathes, and it has for itsobject to provide one with an arm adapted to be engaged by adjustableblocks on the face plate of the lathe, for rocking a shaft which isconnected for moving the slide rest of the lathe, on the carriage onwhich it is mounted.

Additional objects of the invention will appear in the followingcomplete s cification, in which the preferred form 0 the invention isdisclosed.

In the drawings similar characters of reference indicate correspondingparts in all the views, in which Fi re 1 is a perspective view of alathe, provided with my attachment; Fig. 2 is a fragmentary plan view ofthe lathe, showing the carriage; and Fig. 3 is a transverse sectionalview of the lathe, and carriage.

By referring to the drawings it will be seen that a bearing member 5 issecured to the lathe 6, and that in this bearing 5 there is journaled arock shaft 7, the said rock shaft 7 being also disposed for sliding inbearing members 8, whlch are spaced apart and which are secured to thecarriage 9 of the lathe. Disposed between the bearing members 8 andmounted on the rock shaft 7, there is a sleeve 10, the said sleeve 10being keyed to rotate with the said rock shaft. Secured to the sleeve 10there is a crank 11, the said crank 11 being connected b a link 12 withthe slide rest 13. Secure to the rock shaft 7 at one side of the bearingmember 5, there is a depending arm 14, a spring 15 being provided whichengages the lathe 6 and the depending arm 14 for holding the said arm 14yieldingly outward from the lathe. At the other side of the bearing 5 acollar 16 is secured to the rock shaft 7. It will therefore be seen thatby means of the depending arm 14 and the collar 16, which are bothsecured to the rock shaft,

one at each side of the bearing 5, the rock shaft 7 is prevented frommoving longitudinally relatively to the bearing 5. Another arm 17 issecured to the rock shaft 7, this arm 17 projects upwardly, and has alateral pin 18, on which a roller 19 is mounted to rotate, the saidroller 19 engagin the periphery 20 of the face plate 21. locks 22 aremounted on the periphery 20 of the face plate 21, the blocks 22 beingheld to the face plate by means of a counter-sunk head screw 23. Theseblocks 22 may be removed when desired, and larger or smaller blocks maybe substituted as desired.

It will be understood that when the lathe is in operation the blocks 22on the face plate 21, will raise the arm 17 at predetermined intervals,and that each time the arm 17 is raised, it will rock the shaft 7 toraise the crank 11, which, by means of the link 12, will move the sliderest inwardly, the said slide rest carrying the tool.

Having thus described my invention, I claim as new, and desire to secureby Letters Patent:

1. In combination with a lathe having a carriage with a slide restmounted for moving thereon, two bearings spaced apart and secured to thecarriage, a third bearing secured to the lathe, a rock shaft mounted toslide in the bearings on the carriage, and journaled in thethird-mentioned bearing, a sleeve having a crank disposed between thefirst two mentioned bearings, and mounted for sliding on the rock shaft,the sleeve being keyed to the said rock shaft, a link connecting thecrank with the slide rest for operating the latter, a block secured to arotatable member of the lathe, and an arm secured to the shaft forengaging the block to be operated thereby.

2. In combination with a lathe having a face plate and a carriage with aslide rest mounted for moving thereon, two bearings spaced apart andsecured to the carriage, a third bearing secured to the lathe, a rockshaft mounted to slide in the bearings on the carriage, and journaled inthe thirdmentioned bearing, a sleeve having a crank disposed between thefirst two mentioned bearings, and mounted for sliding on the rock shaft,the sleeve being keyed to the name to this specification in the presenceof said rock shaft, a lilk connecting the crank two subscribingWitnesses. with the slide rest or operatin the latter, blocks mounted onthe face pate of the ADDO ROBERTS lathe, and an arm secured to the shaftfor \Vitnesses: engaging the blocks to be ofierated thereby. S. M.AHEARN,

In testimony whereof I ave signed my P. S. VINTER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. O.

